Article of footwear



FIG. 1 is a right side elevational view of the article of footwear showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a right side perspective view thereof. 

The ornamental design for an article of footwear, as shown and described. 